A second teen has been arrested and charged with her classmate’s murder on Monday in Newark, Delaware. Annika Stalczynski, 17, was arrested in her home after a New Castle County Grand Jury indicted her with first-degree murder. The horror unfolded after 17-year-old Madison Sparrow, a junior in Newark Charter High School didn’t come home from shopping with a friend on October 2. After her mother reported her missing around 8:30 pm, officials found her body the next day.